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A. LANGLAIS. GLASS BEVELI'NG MACHINE.

7 No. 408,726. Patented Aug. 13, 1889.

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A. LANGLAI S. GLASS BEVELING MACHINE.

N0. 408,726. Patented Aug. 13, 1889.

V UNITED STATES PATENT OFFICE.

ALONZO LANGLAIS, OF MONTREAL, QUEBEC, CANADA, ASSIGNOR OF ONE- HALF TOA. RAMSAY & SON, OF SAME PLACE.

GLASS-BEVELING MACHINE.

SPECIFICATION forming part of Letters Patent No. 408,726, dated August13, 1889.

Application filed November 30, 1888. Serial No. 292.250. (No model.)

To all whom it may concern:

Be it known that I, ALONZO LANGLAIS, of the city of Montreal, in thedistrict of Montreal and Province of Quebec, Canada, have inventedcertain new and useful Improvements in Glass-Beveling. Machines; and Ido hereby declare that the following is a full, clear, and exactdescription of the same.

This invention relates to that class of machines in which a movabletable or carrier is used for bringing the glass against the face of arevolving grinding-disk in stationary bearings, and may be broadlydescribed as consisting of a frame-work upon the upper side of whichtracks are placed for a carriage mounted on wheels to run along, fromthis carriage being suspended the table (capable of adjustment atdiffering angles) for holding the glass, and at a point about midway ofthe frame being situated the grinding-disk, the, whole being providedwith suitable runninggear, reverse and stop-motion mechanism, thearrangement and details of construction of the parts which constitutethe invention obviating many serious difficulties hitherto experiencedin the operation of such machines.

For full comprehension of the invention reference must be had totheannexed drawings, in which Figure 1 is a view of the front side ofthe machine; Fig. 2, a plan, and Fig. 3 an end View, of same; Fig. 4, adetail of reversing and stop-motion mechanism; and Figs. 5,6,

and 7 details of grinding mechanism.

Similar letters of reference indicate like parts.

A is the frame-work, of any suitable construction and rectangular inform.

a a are tracks placed along the top of the upper longitudinal timbers,and Bis a carriage or traveler mounted on wheels moving on such tracks 4B is a rack placed in the center of the top of the carriageand-extending longitudinally its whole length.

B B are hangers secured centrally at each end of the carriage I), and coare blocks working in guides in such hangers and carrying the ends ofthe shaft 0', on which ta- I ble 0 is mounted, these blocks being raisedand lowered by the operation of screws 1) b, threaded through them.

D is a longitudinal shaft, connected with each screw 1) by miter-gearing(I, as shown, which can be rotated by means of a crank or key fitted onone of its ends extended for the purpose, as shown at d.

The table 0 is a rectangular open-Work frame constructed with a view ofallowing all dust to fall through it. It is not borne exactlyequidistant from both sides in order that as large a proportion aspossible of its surface may be brought to the front side, an adjustablecounterpoise G being arranged on the opposite side to counterbalancesuch preponderance, and also to secure the necessary pressure againstthe face of the grindingdisk.

posit-ion to an angle the shaft D is rotated in the required direction,the rotation of the screws 1) raising the blocks 0 c, and as the frontof the table is held down by a stop a on the frame-work A, the table istilted on its axis 0, and when the desired position is secured, thegravity-weight is adjusted to balance the weight of the glass and theextra preponderance mentioned and to secure the necessary pressure.

The grinding-disk F is illustrated clearly in Figs. 5, 6, and 7, thefirst of these being a plan view and. Figs. 6 and 7 sections taken,

respectively, on lines as a: and z 2, Fig. 5. It

willbe seen that it has an annular beveled grinding-face F, the bevelrendering the disk deeper at the inner periphery of such grinding-facethan at the outer. In order that the disk may revolve in such a way asto bring but aver -y small portion of the annular abrading-face incontact with the glass at one time, its axis, in addition to being setat the angle required for beveling, is caused to lean or be tiltedtoward the side from which the glass approaches, in order that, asshown, no cut ting will take place except at the point P i. 6., insteadof in the usual saw-like fashion a segment of the disk in the axis ofthe same at right angles to the plate bearing upon this latter, thewhole depth of the grinding-face, taken in radial sect-ion at a certainpoint,

In adjusting the table from the horizontal comes almost parallel withthe edge of the plate before beginning to cut, as shown in Figs. 5 and7. In fact, the cutting is performed pretty much in the same manner asif a rapidly-moving chisel were placed at a certain angle and a strip ofmaterial passed along so that the chisel would cut through from the topside to the front edge, and thus produce the bevel. Such an arrangementsecures an immediate clearance of the portion, however small, previouslyground. The disk has a hub F and is mounted on a shaft e, carried insuitable bearings at such an angle as will secure for the disk theproper position relatively to the table when set horizontally, to allowa variation of bevel on the glass, say, from one to thirty degrees, thegreater angle being obtained while the table is horizontal and the lesswhen it is brought almost parallel with the disk.

It is apparent from Figs. 0 and '7 that the shaft 6 of the grinding-diskto secure the beveling angle and the shortness of contact of the diskwith the glass must be set at a compound an gle, and the shaftin Fig. 6shows the inclination of the shaft out of the vertical to secure thebeveling-angle, and the dotted line 1 1 in Fig.7 indicates the departureof the shaft-axis from the vertical to secure the shortness of contact,the divergences being at right angles to each other, and resulting inthe compound angle required.

A simple way of securing the tilt, as in Fig. '7, is to insert wedgesbeneath the bed-plate of the grinder at the right-hand side, looking atFig. 1, or any other means of adjustment might be used.

The beveling of the grinding-face is of course to compensate for thesecond tilt given to the disk, and to bring the radial lines of suchface, when in contact with the plate, parallel ornearly so, thereto. Oneof thebearings for the shaft 6 is situated below the grindingdisk, andif it were not protected from the dust and ground glass which fall downin its vicinity the action of the shaft would be materially affected. Iguard against this by casting a hub or shield H on the shaft, recessedto fit over the upper end of the bearing, as shown in Fig. 3. I am alsoable by this arrangement of the disk grinding with its under face toplace a corer II above it, so as to protect the upper journal. Thedisk-shaft can be rotated by any system of belts and pulleys or gearingdesired, this forming no part of my invention, and the sand and waterusually employed to assist the grinding may be conducted to the desiredpointin any suitable way.

Reverting to the table C, C C are buttons, which may be turned up so asto form extra surface, against which the edge of the glass can bepressed when being placed on the table, so as to insure its correctposition thereon, and afterward turned down, leaving it with no othergage than the projecting edge of the strips 0, extending about athird ofthe thickness of the glass, so as not to interfere with the grinding.

c c are the necessary adjustable holdfasts required, consisting ofwooden slats with thumb-screws for tightening tongues sliding indovetailed grooves, as is well understood.

0 are loose slats for the glass to rest on.

To secure the reciprocal action of the table, a driving-shaft J iscarried across the top of the frame in suitable bearings J J, attachedto side timbers A A, set up on top of the frame proper, and a pinion 7',loosely mounted on such shaft, intermeshes with the rack B on thecarriage 13.

Two loose pulleys K K with a tight one K intervening, are mounted on theshaft J, andtwo driving-belts runningin opposite directions are takenaround them, their positions being, while the machine is at rest, one onthe tight pulley and the other on one of the loose pulleys, so that theshaft-is revolving in the direction of the belt on the tight pulley; butas the pinion is mounted loosely on it the carriage is not operated. Toconnect the pinion with the shaft, when it is desired to operate thecarriage, a clutch L is used, worked by the hand-lever L, through anyordinary connections.

To start the machine, the clutch is operated to connect the pinion withthe shaft, and upon whichever belt is placed the tight pulley willdepend the direction of movement of the carriage and table, which willalways be the same as that of such belt. The means for so placing thebelts will be described farther on.

As the edges of the glass plates to be beveled are of various lengths, Iemploy a variable cut-off consisting of a movable dog or detent M,arranged to slide along the top of one of the longitudinals of thecarriage B and be secured at any required point, and in connection withapparatus for placing the driving belts, as before mentioned, thisconsisting of lever N, having arm N connected with slidebar N carryinghoop 'n for encircling the belts. I pivot on the lever N, so as to workvertically and be moved by such lever in its horizontal movement, anadditional lever O, carrying on one end a pin 0, projecting downwardlythrough aslot in the lever N, so as to be in the way of the dog M, andby the onward movement of such dog be caused to press against the sideof the slot and move the lever N, so as to dispose the belts in positions directly opposite to those previously 0c cupied by them-viz, thebelt which was on the tight pulley off it onto a loose one, and the beltpreviously on the loose pulley onto the tight one, thus reversing thedirection of movement of the carriage so soon as the end of the glass isreached and causin g it to travel back to its original position.

Q is an additional hand-lever connected with lever N, whereby theposition of the belts may be easily controlled by hand in the event of aportion of the glass being discovered to IIO ratus placed belowbe'harder than the balance, and therefore requiring regrinding. I

It will be seen that by the construction of my machineviz., with thegrinding appathe level of the traveling mechanism-410 interruption willoccur to the working by any portion of the abrading substancedust,&c.getting into the machine,

' and that the bearing-surfaces of the grinding a apparatus arethoroughly protected against grit, &c.

What I claim is as follows:

1. In a glass-beveling machine, the combination of framework supportingtracks, a

r 5 movable carriage adapted to travel along same, hangers suspendedfrom such carriage, a table carried in such hangers, on Which glassplates are placed, a grinding-disk in stationary bearings, drivingmechanism and automatic reversing mechanism controlling same for givingsaid carriage reciprocal motion, whereby the glass plates are subjectedto the action of such disk.

2. In a glass-beveling machine, the combination of frame-Work supportingtracks, a

movable carriage adapted to travel along same, hangers suspended fromsuch carriage, a table supporting the glass plates carried axially insuch hangers and being capable of 0 adjustment at various angles, screwsfor securing such adjustment, a grinding-disk in stationary bearings,and driving mechanism and automatic reversing mechanism controlling samefor giving the aforesaid carriage re- 3 5 ciprocal motion, whereby theglass plates are subjected to abrasion from the under surface of saiddisk.

3. In a glass-beveling machine, the combination, with a frame-worksupporting tracks,

40 a movable carriage traveling on same, and

hangerssuspended from said carriage, a shaft carried in movable blockscapable of adjustment in said hangers, and screw mechanism for obtainingsuch adjustment, of a table for supporting the glass plates mountedeccentrically on such shaft, and an adjustable counterpoise adapted tocounterbalance the preponderance of table on one side of its axis andsecure the pressure of the glass plates against the face of thegrinding-disk.

4. In a glass-beveling machine, the combination of a frame A, tracks aa, carriage B, hangers B and blocks 0 0, Working in same, screws foradjusting said blocks, shaft 0', carried by said blocks, table 0,mounted on such shaft, driving mechanism and automatic reversingmechanism for controlling same for imparting to said carriage reciprocalmotion, and means for governing such reciprocal motion, allsubstantially as herein shown and described.

5. In a glass-beveling machine, the combination, with carriage B,driving mechanism and automatic reversing mechanism controlling same forimparting to such carriage reciprocal motion, and hand-lever forgoverning such motion, of cut-off mechanism, substantially as shown anddescribed, consisting of dog M, lever O, and pin 0 on same.

6. In a glass-beveling machine, a grindingdisk With grinding-face on itsunder side, a rotary shaft and bearings carrying such shaft at an angleboth to the longitudinal and transverse axes of the machine, thegrinding-face on the under side of such disk being beveled to compensatefor the inclination of the shaft out of the transverse vertical axis.

. 7. In a glass-beveling machine, the combination, With the rotatingshaft 6, mounted in bearings, of recessed shield H cast on it, as andfor the purpose described.

ALONZO LANGLAIS. Witnesses:

FRAS. HY. REYNOLDS, OWEN M. EVANS.

